The Effect of the Magnesium Content and Mechanical Activation on Combustion in the Ni + Al + Mg System
Н. А. Кочетов
Abstract
The effect of the magnesium content and mechanical activation (MA) of the Ni + Al + Mg system under study on the elongation of samples during combustion, the maximum temperature and combustion rate, the size of composite particles and the yield of the mixture after activation, and the phase composition and morphology of the reaction products is studied. The synthesis parameters at which the triple phase of Ni2Mg3Al are determined. It is experimentally shown that activation leads to an increase in the reaction rate and reduces the maximum combustion temperature of the mixture. With an increase in the magnesium content in the Ni + Al + Mg mixture, the combustion rate first increases (when the Mg content is 10%), then decreases, and the maximum reaction temperature decreases over the entire range of values studied. The observed dependences of the average size of composite particles, the yield of the mixture after MA, and elongation of the samples during combustion on the Mg content in the Ni + Al + Mg mixture are not monotonic. MA leads to the formation of highly porous synthesis products.